Artificial silk thread package



May 13, 1941. GRAUER 2,241,510

ARTIFICIAL SILK THREAD PACKAGE Filed June 24, 1937 --A|- U u- I] I]: I- "Q1" Patented May 13, 1941 UNITED STATES PATENT OFFICE ARTIFICIAL SILK THREAD PACKAGE Theodor Gra'uer, Horn, Thurgau, Switzerland 4 Claims.

This invention relates to a package of spun artificial silk thread.

In the production by the so-called direct method of artificial silk spun upon winding carriers, whereby reeling is omitted and also after treatment in the hank, there is obtained on the usual rigid carriers artificial silk which is relatively uneven in dyeing property and stretch. The consequence thereof is that the threads cannot shrink properly on the rigid carriers during the drying process and are stretched irregularly, thus resulting in varying dyeing properties of said threads.

It has been thought that on account of the employment of winding carriers fitted in the manner of reels with bars, or having the form of sleeves or the like allowing a flexing or disstretching or yielding of the artificial silk cake the disadvantages and difliculties could be removed, which arise from the use of rigid carriers.

But it has appeared that in such cases the artificial silk does not always possess the required evenness. v

This unevenness, however is variously produced depending on the forms of winding mecha nisms used.

On most yielding carriers the cake is very diflicult to seal; the silk is thus cramped or squeezed; the penetration of the cake 'by the processing liquids is irregular, in some places too much and in other places too little liquid passing through the yarn layers.

In many arrangements, and especially in the case of winding carriers built up of sleeves the disstretching or the yielding of the yarn mass is not uniform; the result is irregular stretching. In other arrangements the thread layers may be easily washed out or the threads may be incompletely washed out and thus nipped or held fast, which results in a bad unwinding and further irregular stretching.

The most difiicult problem arises in connection with the sealing of the openings in the carrier body necessary for the movable yielding parts and to this end, there has been proposed a carrier with lateral flanges between which movable bars pass radially and wherein through supporting of the yarn mass on the inclined flanges a sealing can be realised by the'silk coil itself. This adjustable carrier is disclosed in the specification of U. 5. Patent No. 2,074,217. Experience, however, has shown that with this device a further difliculty arises which does not permit of the production of artificial silk'uniformly free from defects aridstretches. This sages are only varied in size.

difiiculty resides in that with a normally wound carrier it is impossible to obtain an even washing off. i

It has now been found, that only by the use of this known yielding carrier having marginal flanges, in combination with a special winding method, can success be attained and a uniformly shrunk silk with regular dyeing property and stretch be produced.

The particular winding device relies upon a completely porous structure of the artificial silk cake. This porous structure comes about in that one produces a so-called honey-comb winding which is traversed by liquid conducting passages from the inner part to the outer part of the cake. Thus the porous honey-comb cake can be wound with increasing thread traverse on carriers with adjustable diameters and lateral outwardly extending fixed flanges in such manner that from inside to outside the same number of passages is always ailforded, the said pas- Such a structure of the cake requires accurately constructed drive mechanism for the carrier and thread traverse guide and suitable gearing, which are adapted to produce the required winding.

An expanding winding carrier suitable for the carrying out of the invention, is shown in the accompanying drawing in which:

Fig. 1 indicates a carrier having a winding the upper half being in section and the lower half in elevation.

Fig. 2 shows an alternative arrangement of the winding, the upper half being in section and the lower half in elevation.

In Fig. 1 there are indicated at IS the passages which are formed through the cake ll. It can be seen that these extend radially and become wider owing to the outwardly deflected or directed flange portions 2 and 3 of the carrier having the cylindrical portion or barrel I. This winding formation can only be produced by giving to the thread guide a progressively increased movement which corresponds to the increasing distance between the said deflecting flanges. This growing thread traverse path produces a winding of the thread close up to the flanges, the same applying even if the cake becomes thicker i. e. larger in diameter and the flanges further apart. At It in Fig.1 the cake is shown in honey-comb formation and in elevation. By the combination of honey-comb build and ex pansible winding carrier herein contemplated there can be produced in a surprising manner a uniformly good artificial silk by the direct greatest care for the threads and after loosening oi the stretcher bars by contracting the springs an unobstructed shrinking oi the all]: threads,

whereby there are obtained an even andgood stretching of the silk and evenness in dyeing property. The winding herein-above mentioned is applicable equally to the production of the usual normal unstretched artificial silk as to the production of stretched artificial silk, which is spun with the aid of stretching devices and is wound upon the carrier in stretched condition.

According to the kind and closeness of the porous winding the relaxing of the artificial silk cake can be effected either before or after the after-treatment which has to be efi'ected on the spinning carrier. At all events it must be done before the drying process is passed through.

Coarse-threaded, unstretched artificial silk which can be easily handled, may for example be relaxed after passing through the after-treatment, and fine-threaded stretched artificial silk, which gives a close impenetrable winding, may be relaxed before the after treatment: in both cases 'an unobjectionabie result is obtained. The relaxing can obviously be effected by stages during the after-treatment.

Although a porous honey-comb winding with increasing thread traverse path is mentioned hereinabove, it will logically be understood that the length of the path of the thread guide is increased during working.

In Figs. 1 and 2 of the drawing, a carrier is shown which has flanges 2, 3 at respective ends which at their outer parts are at a greater distance apart than at their inner parts at the The result thus is that a regular porous winding of the cake is obtained.

A cake having a considerably larger thread content is thus obtained without the penetrability of the cake by the after-treatment liquids being diminished. The advantages of the invention are thus really evident.

The cake which is spun with increasing stroke of thread guide can bear any proportion to the winding effected with diminishing traverse length or stroke; the proportion may be about 1:1 as in the attached drawingor the windings can be in the proportion 1:2 or 2:1 or in any other desired proportion.

A further improvement obtained by the invention is that the pores a: which extend throughout the entire winding I from inside to outside (see lines "I, 20, 10', etc.), are made larger towards the flanged parts A and B of the cylindrical barrel i of said carrier. If the carrier shall be fully wound, it is a condition that the thread, if the cake increases in thiclmess, is spread further apart, that is to say the thread traverse path must be increased to carry the threads right up to the flanges, which indicates the increasing thread traverse ath above referred to.

The characteristic feature is not that a greater numerous amount of honey-comb is produced by the increased thread traverse path, but that a similar amount of honey comb is produced on the outside of the long cylinder length of the fully wound carrier, as inside on the short cylinder length when the cake is newly begun. The passages or channels it (Fig. 1) travel therefore in radial direction outwards, thus explaining and indicating the increasing thread traverse path.

The described porous cake produced on an expanding coil can practically also be so formed on the carrier that the winding, that is to say the thread guide, is driven with an increasing and afterwards with a. decreasing stroke (Fig. 2).

It is thus also not necessary that the artificial silk cake shall be contained absolutely between the flanges of the carrier or in other words that the flanges of the carrier be greater in diameter than the cake.

In accordance with the present invention it therefore is proceeded so that the thread guide which during the making of the cake (Fig. 2) forms the thread layers a.b to c-d, has a progressively increasing stroke and from thence during the formation of the layers c-d to &-f has its path or stroke further progressively diminished or decreased.

" carrier, that is to say the thread guide moves quicker towards the end of its stroke than in the middle. It thus occurs that in spite of the increase and decrease of the traverse path (stroke) and the resulting slight displacement of the thread layers the passage ways for the aftertreatment liquids remain uniform throughout the whole length of the cake.

From the foregoing it will be seen that there has been provided a package of freshly spun artificial silk thread comprising a carrier having a cylindrical portion, and a winding of artificial silk thread provided therethrough with passages in' honey-comb fashion and placed around said cylindrical portion, the winding having layers gradually increasing in length. outwardly from the surface of the carrier toward the ends thereof, the passages being equal in number along each layer of the winding in horizontal direction and increasing in area progressively from the center of the winding toward the ends of the carrier, the carrier being preferably provided with deflected outwardly directed flange portions with which to accommodate the gradually increasing-in-length of the winding in conformity with the increasing distance between the flange portions. e

I claim:

1. A package of freshly spun artificial silk thread comprising a carrier having a cylindrical portion and gradually deflected outwardly directed flange portions, and a winding of artificial silk thread provided therethrough with passages in honey-comb fashion and placed around said cylindrical portion, said winding having layers gradually increasing in length in conformity with the increasing distance between the flange portions outwardly from the surface of said carrier to the periphery of the flange portions and then 2. In apackage of freshly spun artificial silk threadhaving a carrier with a cylindrical portion and gradually deflected outwardly directed flange portions; a winding of artificial silk thread, and uninterrupted adjacently positioned channels of honey-comb fashion passing through said winding and placed around said cylindrical portion, said winding having layers gradually increasing in length in conformity with the increasing distance between the flange portions outwardly from the surface of said carrier to the periphery of the flange portions and then gradually decreasing in length to the surface of said winding, said channels being equal in number along each layer of said winding in horizontal direction and increasing in area progressively from the center of said winding toward said flange portions.

3. In a package of freshly spun artificial silk thread having a carrier with a cylindrical portion and gradually deflected outwardly directed flange portions; a winding of artificial silk thread, and uninterrupted adjacently positioned channels of honey-comb fashion passing through said winding and placed around said cylindrical portion, said winding having layers gradually increasing in length in conformity with theincreasing distance between the flange portions outwardly from the surface of said carrier to the periphery of the flange portions and then gradually decreasing in length to the surface of said winding, said channels being equal in number along each layer of said winding in horizontal direction and increasing in area progressively from the layer adjacent said cylindrical portion toward the layer adjacent and substantially in alignment with the periphery of said flange portions.

4. In a package of freshly spun artificial silk thread having a carrier with a cylindrical portion and gradually deflected outwardly directed flange portions; a winding of artificial silk thread, and uninterrupted adjacently positioned channels of honey-comb fashion passing through said winding and placed around said cylindrical portion, said winding having layers gradually increasing in length in conformity with the increasing distance between the flange portions outwardly from the surface of said carrier to the periphery of the flange portions and then gradually decreasing in length to the surface of said winding, said channels'being equal in number along each layer of said winding in horizontal direction and increasing in area progressively from the layer adjacent said cylindrical portion toward the layer adjacent and substantially in alignment with the periphery of said flange portions, and then decreasing in area from said latter layer toward the outermost layer at the surface of said winding.

THEODOR GRAUER 

